[8.x] Adds password rule

src/Illuminate/Contracts/Validation/DataAwareRule.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace Illuminate\Contracts\Validation;
+
+interface DataAwareRule
+{
+    /**
+     * Set the data under validation.
+     *
+     * @param  array  $data
+     * @return $this
+     */
+    public function setData($data);
+}

src/Illuminate/Contracts/Validation/UncompromisedVerifier.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace Illuminate\Contracts\Validation;
+
+interface UncompromisedVerifier
+{
+    /**
+     * Verify that the given data has not been compromised in data leaks.
+     *
+     * @param  array  $data
+     * @return bool
+     */
+    public function verify($data);
+}

src/Illuminate/Validation/NotPwnedVerifier.php

@@ -0,0 +1,94 @@
+<?php
+
+namespace Illuminate\Validation;
+
+use Exception;
+use Illuminate\Contracts\Validation\UncompromisedVerifier;
+use Illuminate\Support\Str;
+
+class NotPwnedVerifier implements UncompromisedVerifier
+{
+    /**
+     * The http factory instance.
+     *
+     * @var \Illuminate\Http\Client\Factory
+     */
+    protected $factory;
+
+    /**
+     * Create a new uncompromised verifier.
+     *
+     * @param  \Illuminate\Http\Client\Factory  $factory
+     * @return void
+     */
+    public function __construct($factory)
+    {
+        $this->factory = $factory;
+    }
+
+    /**
+     * Verify that the given data has not been compromised in public breaches.
+     *
+     * @param  array  $data
+     * @return bool
+     */
+    public function verify($data)
+    {
+        $value = $data['value'];
+        $threshold = $data['threshold'];
+
+        if (empty($value = (string) $value)) {
+            return false;
+        }
+
+        [$hash, $hashPrefix] = $this->getHash($value);
+
+        return ! $this->search($hashPrefix)
+            ->contains(function ($line) use ($hash, $hashPrefix, $threshold) {
+                [$hashSuffix, $count] = explode(':', $line);
+
+                return $hashPrefix.$hashSuffix == $hash && $count > $threshold;
+            });
+    }
+
+    /**
+     * Get the hash and its first 5 chars.
+     *
+     * @param  string  $value
+     * @return array
+     */
+    protected function getHash($value)
+    {
+        $hash = strtoupper(sha1((string) $value));
+        $hashPrefix = substr($hash, 0, 5);
+
+        return [$hash, $hashPrefix];
+    }
+
+    /**
+     * Search by the given hash prefix and returns all occurrences of leaked passwords.
+     *
+     * @param  string  $hashPrefix
+     * @return \Illuminate\Support\Collection
+     */
+    protected function search($hashPrefix)
+    {
+        try {
+            $response = $this->factory->withHeaders([
+                'Add-Padding' => true,
+            ])->get(
+                'https://api.pwnedpasswords.com/range/'.$hashPrefix
+            );
+        } catch (Exception $e) {
+            report($e);
+        }
+
+        $body = (isset($response) && $response->successful())
+            ? $response->body()
+            : '';
+
+        return Str::of($body)->trim()->explode("\n")->filter(function ($line) {
+            return Str::contains($line, ':');
+        });
+    }
+}

src/Illuminate/Validation/Rules/Password.php

@@ -0,0 +1,252 @@
+<?php
+
+namespace Illuminate\Validation\Rules;
+
+use Illuminate\Container\Container;
+use Illuminate\Contracts\Validation\DataAwareRule;
+use Illuminate\Contracts\Validation\Rule;
+use Illuminate\Contracts\Validation\UncompromisedVerifier;
+use Illuminate\Support\Arr;
+use Illuminate\Support\Facades\Validator;
+
+class Password implements Rule, DataAwareRule
+{
+    /**
+     * The data under validation.
+     *
+     * @var array
+     */
+    protected $data;
+
+    /**
+     * The minimum size of the password.
+     *
+     * @var int
+     */
+    protected $min = 8;
+
+    /**
+     * If the password requires at least one uppercase and one lowercase letter.
+     *
+     * @var bool
+     */
+    protected $mixedCase = false;
+
+    /**
+     * If the password requires at least one letter.
+     *
+     * @var bool
+     */
+    protected $letters = false;
+
+    /**
+     * If the password requires at least one number.
+     *
+     * @var bool
+     */
+    protected $numbers = false;
+
+    /**
+     * If the password requires at least one symbol.
+     *
+     * @var bool
+     */
+    protected $symbols = false;
+
+    /**
+     * If the password should has not been compromised in data leaks.
+     *
+     * @var bool
+     */
+    protected $uncompromised = false;
+
+    /**
+     * The number of times a password can appear in data leaks before being consider compromised.
+     *
+     * @var int
+     */
+    protected $compromisedThreshold = 0;
+
+    /**
+     * The failure messages, if any.
+     *
+     * @var array
+     */
+    protected $messages = [];
+
+    /**
+     * Create a new rule instance.
+     *
+     * @param  int  $min
+     * @return void
+     */
+    public function __construct($min)
+    {
+        $this->min = max((int) $min, 1);
+    }
+
+    /**
+     * Set the data under validation.
+     *
+     * @param  array  $data
+     * @return $this
+     */
+    public function setData($data)
+    {
+        $this->data = $data;
+
+        return $this;
+    }
+
+    /**
+     * Sets the minimum size of the password.
+     *
+     * @param  int $size
+     * @return $this
+     */
+    public static function min($size)
+    {
+        return new static($size);
+    }
+
+    /**
+     * Ensures the password has not been compromised in data leaks.
+     *
+     * @param  int  $threshold
+     * @return $this
+     */
+    public function uncompromised($threshold = 0)
+    {
+        $this->uncompromised = true;
+
+        $this->compromisedThreshold = $threshold;
+
+        return $this;
+    }
+
+    /**
+     * Makes the password require at least one uppercase and one lowercase letter.
+     *
+     * @return $this
+     */
+    public function mixedCase()
+    {
+        $this->mixedCase = true;
+
+        return $this;
+    }
+
+    /**
+     * Makes the password require at least one letter.
+     *
+     * @return $this
+     */
+    public function letters()
+    {
+        $this->letters = true;
+
+        return $this;
+    }
+
+    /**
+     * Makes the password require at least one number.
+     *
+     * @return $this
+     */
+    public function numbers()
+    {
+        $this->numbers = true;
+
+        return $this;
+    }
+
+    /**
+     * Makes the password require at least one symbol.
+     *
+     * @return $this
+     */
+    public function symbols()
+    {
+        $this->symbols = true;
+
+        return $this;
+    }
+
+    /**
+     * Determine if the validation rule passes.
+     *
+     * @param  string  $attribute
+     * @param  mixed  $value
+     * @return bool
+     */
+    public function passes($attribute, $value)
+    {
+        $validator = Validator::make($this->data, [
+            $attribute => 'string|min:'.$this->min,
+        ]);
+
+        if ($validator->fails()) {
+            return $this->fail($validator->messages()->all());
+        }
+
+        $value = (string) $value;
+
+        if ($this->mixedCase && ! preg_match('/(\p{Ll}+.*\p{Lu})|(\p{Lu}+.*\p{Ll})/u', $value)) {
+            $this->fail('The :attribute must contain at least one uppercase and one lowercase letter.');
+        }
+
+        if ($this->letters && ! preg_match('/\pL/u', $value)) {
+            $this->fail('The :attribute must contain at least one letter.');
+        }
+
+        if ($this->symbols && ! preg_match('/\p{Z}|\p{S}|\p{P}/u', $value)) {
+            $this->fail('The :attribute must contain at least one symbol.');
+        }
+
+        if ($this->numbers && ! preg_match('/\pN/u', $value)) {
+            $this->fail('The :attribute must contain at least one number.');
+        }
+
+        if (! empty($this->messages)) {
+            return false;
+        }
+
+        if ($this->uncompromised && ! Container::getInstance()->make(UncompromisedVerifier::class)->verify([
+            'value' => $value,
+            'threshold' => $this->compromisedThreshold,
+        ])) {
+            return $this->fail(
+                'The given :attribute has appeared in a data leak. Please choose a different :attribute.'
+            );
+        }
+
+        return true;
+    }
+
+    /**
+     * Get the validation error message.
+     *
+     * @return array
+     */
+    public function message()
+    {
+        return $this->messages;
+    }
+
+    /**
+     * Adds the given failures, and return false.
+     *
+     * @param  array|string  $messages
+     * @return bool
+     */
+    protected function fail($messages)
+    {
+        $messages = collect(Arr::wrap($messages))->map(function ($message) {
+            return __($message);
+        })->all();
+
+        $this->messages = array_merge($this->messages, $messages);
+
+        return false;
+    }
+}